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Title: Pump laser induced photodarkening in ZrO2-doped Yb:Y2O3 laser ceramics
Authors: Wang, Jun
Yin, Danlei
Ma, Jie
Liu, Peng
Wang, Ying
Dong, Zhili
Kong, Ling Bing
Tang, Dingyuan
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Wang, J., Yin, D., Ma, J., Liu, P., Wang, Y., Dong, Z., Kong, L. B. & Tang, D. (2019). Pump laser induced photodarkening in ZrO2-doped Yb:Y2O3 laser ceramics. Journal of the European Ceramic Society, 39(2-3), 635-640.
Project: 2016-T1-001-026
Journal: Journal of the European Ceramic Society
Abstract: 5 at.% Yb:Y2O3 transparent ceramics were fabricated using vacuum sintering plus HIP. The ceramics doped with 1 at.% ZrO2 as the sintering additive were densified at 1700 °C in vacuum followed by HIPing at 1775 °C, while those without sintering additives were densified at 1520 °C in vacuum followed by HIPing at 1450 °C. After sintering, both ceramics had relatively high in-line transmittance. However, during laser experiments, the ZrO2-doped Yb:Y2O3 (Zr-YbY) ceramics were photodarkened when irradiated by 940 nm pump light. The discoloration might be attributed to the formation of Zr3+ color centers during lasing. In contrast, no photodarkening effect was detected in the pure Yb:Y2O3 ceramics without sintering additives (P-YbY). The P-YbY ceramics exhibited much higher lasing efficiency (17%) than the Zr-YbY ceramics (9%). To our best knowledge, it is the first time that the photodarkening effect was detected in rare-earth doped sesquioxide laser ceramics.
ISSN: 0955-2219
DOI: 10.1016/j.jeurceramsoc.2018.10.003
Rights: © 2018 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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